I have convergence problems (temperature limited to...) using PISO and VOF scheme. The simulation convergens really well at the beginning. However, after 30000 iterations, it diverges and it shows that temperature is limited ....

If this happens at the beginning then I know how to adjust it. I know it is the energy equation that causes the divergence. (If I use a room temperature in the domain then no problems!) Why the divergence comes so late? then )The mesh and the domain are quite good. What are the problems? Thank you!